EP 2224120 A2 20100901 - Auxiliary lubricating pump for turbofan drive gear system
Title (en)
Auxiliary lubricating pump for turbofan drive gear system
Title (de)
Schmierölhilfspumpe einer Getriebe-Antriebseinheit für Gasturbinenturbofantriebwerk
Title (fr)
Pompe de lubrification auxiliaire pour train de transmission à engrenages de turboréacteur
Publication
Application
Priority
US 39374309 A 20090226
Abstract (en)
A pump system (50) for lubricating a bearing (96) in a gear system (36) includes an auxiliary pump (70) connected to the gear system. The auxiliary pump is fluidically connected to the bearing through an auxiliary supply passage (72) and to a reservoir (92) through an auxiliary scavenge passage (76). An auxiliary valve (74) is fluidically connected to the auxiliary supply passage for transferring liquid from the auxiliary pump to the bearing when a pressure in the auxiliary supply passage downstream of the auxiliary valve is less than a particular threshold and for transferring liquid from the auxiliary pump to the reservoir when the pressure in the auxiliary supply passage downstream of the auxiliary valve is greater than the particular threshold. A method for circulating liquid is also included.
IPC 8 full level
F02K 3/02 (2006.01); F01D 25/20 (2006.01)
CPC (source: EP US)
F01D 25/20 (2013.01 - EP US); F02C 7/36 (2013.01 - EP US); F01M 2001/123 (2013.01 - EP US)
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO SE SI SK SM TR
Designated extension state (EPC)
AL BA RS
DOCDB simple family (publication)
EP 2224120 A2 20100901; EP 2224120 A3 20120111; EP 2224120 B1 20151014; US 2010212281 A1 20100826; US 8307626 B2 20121113
DOCDB simple family (application)
EP 09252941 A 20091231; US 39374309 A 20090226